The correct answer is (a) Uttarkashi.
Gochar airstrip is located in the town of Gochar in the Uttarkashi district of Uttarakhand, India. It is a small airstrip that is used for both commercial and military purposes. The airstrip is located at an altitude of 2,000 meters (6,600 feet) above sea level.
The other options are incorrect.
(b) Chamoli is a district in the Indian state of Uttarakhand. It is located in the Garhwal region of the state. The district is known for its mountains, glaciers, and rivers.
(c) Pithoragarh is a district in the Indian state of Uttarakhand. It is located in the Kumaon region of the state. The district is known for its mountains, forests, and temples.
(d) Paur is a town in the Indian state of Uttarakhand. It is located in the Garhwal region of the state. The town is known for its temples and monasteries.